Penstabilan Daya Dioda Laser Secara Otomatis Sebagai Sumber Cahaya Pada Sensor Optik

Abstract

Since the invention of laser beam in the 1960s, the application extends to all areas, even revolutionizedseveral fields of technology. Laser is the most widely used in electronic applications as the laser diode. Theimportant application of laser diodes is as a light source for an optical sensor on the sensor either directly orusing the optical fiber. In the application as light source in optical sensor applications, especially on the principleof change in intensity, the stability of laser diode output power is a variable that should be received the necessaryattention. So that, it is needed a Power Control which will automatically control the output power of laser beam.In this study we designed the power stability circuits using the APC LD 2000. The measurement results show thatthe stability strongly depended on the injection electric current area. When it was be operated in the largerinjection electric current area, the laser diode power tobecame larger and more stable than using with themedium or the lower injection electric current.